JP2850976B2 - Granular carrier for treating wastewater using tires, method for producing the same, and wastewater treatment apparatus using the granular carrier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a granular carrier for biological treatment using waste tires, a method for producing the same, and an apparatus for treating wastewater using the granular carrier.

[0002]

2. Description of the Related Art In general, as a major required characteristic of a microorganism-immobilized carrier for biological treatment which is put into practical use, it is required that the strength of a granular carrier and the adhesion strength of an inorganic powder be large.
Conventionally, those having a smaller specific surface area or coated granular carriers have been used.

[0003] However, the conventional one having a small specific surface area is as follows.
There is a problem that the amount of attached microorganisms is small. In addition, for those having a large specific surface area, the coated inorganic powder is desorbed during long-term aeration, and particularly when a specific industrial wastewater is applied, the form is worn by the wastewater temperature and mechanical impact, and the specific surface area of the granular carrier is reduced. It cannot be fully utilized, it is difficult to control the particle size of the carrier during the production process, and there is a drawback in that a technology for controlling the temperature and moisture of the reactor is required during production.

On the other hand, a method which has been widely used as a conventional method for treating high-concentration hardly decomposable wastewater is to use an activated sludge method. In this method, pollutants dissolved in wastewater are simply decomposed and treated by sludge microorganisms in an aeration tank, and the MLSS (Mixed
Liquid Suspended Solid) is 2,000-3,000m
Since it is about g / L, the processing time is long, and the prolonged processing time increases the amount of air consumption and requires a large amount of air. Therefore, there is a problem that the size of the aeration device for blowing air artificially must be increased. Roots blowers are more expensive than expensive compressors because the existing activated sludge process produces a lot of air at a lower cost.
Is used. At this time, the pressure of the root blower is 0.5
To 0.6 kg / Cm ² , and the height of the water tank is limited to about 4 to 6 m due to the pressure limit. Under such general conditions, since only 3 to 7% of the supplied oxygen is dissolved in water, there is a problem that a large amount of air must be supplied to supply a large amount of oxygen.

[0005]

As described above, conventionally, it is difficult to control the particle size of a carrier for treating wastewater,
There is a problem in manufacturing, and furthermore, a large amount of air is required for a device for treating sewage wastewater, and there are problems such as an increase in incidental costs.

The present invention is to solve the above-mentioned conventional problems.

[0007] A first object of the present invention is to enhance the mechanical abrasion resistance and chemical resistance, to increase the strength of the granular carrier and the adhesion strength of the inorganic powder, to increase the specific surface area of the carrier, and to increase the surface area of the carrier. It is an object of the present invention to provide a granular carrier capable of immobilizing microorganisms and enabling high-speed treatment of wastewater. Further, a second object of the present invention is to easily adjust the blending of the raw materials, easily adjust the size and specific gravity of the carrier, and easily adjust the requirements for each use of the product in manufacturing the granular carrier. It is another object of the present invention to provide a method for producing a granular carrier capable of greatly improving the production yield.

Further, a third object of the present invention is to realize an apparatus capable of treating wastewater using the above-mentioned granular carrier, so that the granular carrier inside the treatment tank is not intermittently replaced.
The object of the present invention is to make it possible to treat wastewater more rapidly and to increase the treatment efficiency in a circulation manner by a single charge.

[0009]

SUMMARY OF THE INVENTION In order to achieve the first object, the present invention provides a tire powder having a high mechanical wear resistance and a high chemical resistance, and a hydrophilic and strong bonding force as a combined body. Provided is a granular carrier for treating wastewater composed of ethylene vinyl acetate (abbreviated as EVA) or a derivative thereof, which is chemically stable and can withstand high temperatures, and activated carbon or an inorganic powder equivalent thereto. Things.

In order to achieve the second object, the present invention provides a method for manufacturing a tire, comprising:
After mixing and stirring at a ratio of 30 to 50 parts by weight to parts by weight,
The EV in the mixture at a temperature of 100 to 250 ° C
A or a derivative thereof is dissolved to bind the powdered tire to activated carbon or an inorganic powder equivalent thereto, and then extruded by an extruder, cut, and left in a state of being adhered to the surface of the carrier.
An object of the present invention is to provide a method for producing a granular carrier for treating wastewater using a tire, which is obtained by coating VA or a derivative thereof with a powder.

Another object of the present invention to achieve the second object is to mix 30 to 50 parts by weight of EVA or a derivative thereof with 100 parts by weight of tire powder, stir and maintain 100% by weight. At a temperature of ~ 250 ° C, the EVA or its derivative in the mixture is melted and the powdered tire is combined, and then extruded with an extruder. At the time of extruding, EVA or its EVA which has been melted on the surface by its own retained heat An object of the present invention is to provide a method for producing a granular carrier for wastewater treatment using a tire, which comprises attaching activated carbon or an equivalent inorganic powder to the surface thereof using a derivative, cooling, and cutting the same into a certain size.

According to the present invention, waste water can be treated at high speed using waste tires, and the rubber portion contracted by the internal pressure of the extruding portion comes out and expands. The specific surface area of the carrier can be made to be twice or more as a result of being made amorphous. Therefore, by adhering activated carbon or a similar inorganic fine powder to the surface of the carrier, the surface of the carrier can be used to immobilize a large number of microorganisms, thereby enabling high-speed treatment of wastewater. In particular, it is easy to adjust the size and specific gravity of the carrier by adjusting the nozzle size and the cutting speed of the extruded part, it is easy to adjust the requirements for each product use, and the production yield can be greatly improved. .

Further, the wastewater treatment apparatus for achieving the third object is an outer cylinder, an inner cylinder provided inside the outer cylinder, and a wastewater treatment apparatus installed at an upper portion of the outer cylinder to supply the wastewater. A supply unit, a carrier separation unit installed at the upper part of the inner cylinder and separating and guiding bubbles attached to the granular carrier, and a treated wastewater provided at one upper side of the carrier separation unit and treated And an inner pipe diffuser pipe and an outer pipe diffuser pipe which are respectively installed at regular intervals outside the inner pipe, and are installed at a lower portion of the inner pipe so that compressed air is introduced. It is an object of the present invention to provide a wastewater treatment apparatus using a granular carrier, comprising: an injection pipe that performs the induction of the wastewater and the granular carrier inside the injection pipe.

According to the present invention, it is possible to quickly treat wastewater by the wastewater treatment apparatus into which the granular carrier is charged.
Processing efficiency is improved.

[0015]

Embodiments of the present invention will be described below.

The granular carrier of the present invention is obtained by binding tire powder to activated carbon or an inorganic fine powder equivalent thereto with EVA or a derivative thereof.

Since the tire powder is excellent in mechanical abrasion resistance and chemical resistance, the use of the powder improves the strength of the granular carrier. The particle size of the tire powder is not particularly limited, but tire powder having a particle size of 0.2 to 3 mm is preferably used. As the tire, a waste tire can be used, which is preferable from the viewpoint of global environmental protection.

As the binder, a resin which is hydrophilic, has a strong binding force, is chemically stable, and can withstand high temperatures is used.
Examples of such a resin include EVA and a resin similar to EVA and having a binding force and a hydrophilic property. Examples of the resin having a binding force and a hydrophilic property similar to EVA include a derivative of EVA. By using these resins, the bonding between the tire powders or between the tire powders and the inorganic fine powders becomes stronger. The compounding amount of EVA is preferably 30 to 50 parts by weight based on 100 parts by weight of the tire powder.

Examples of the inorganic fine powder similar to activated carbon include zeolite and anthrocite. The compounding amount of the inorganic fine powder (the coating amount when coated later) is preferably 5 to 15 parts by weight based on 100 parts by weight of the tire powder.

Next, the method for producing the granular carrier of the present invention will be described. First, the tire powder and the resin as a combined body are stirred by a mixer to maintain a constant composition, and then the resin in the mixture is dissolved at a high temperature to bond the powdered tire. Next, the mixture is extruded with an extruder, cut into a predetermined size, and the retained heat of the cut carrier is used to form activated carbon or an inorganic fine powder equivalent thereto using the resin dissolved on the surface. Attach. Activated carbon or a similar inorganic fine powder may be combined with tire powder before being extruded.

When the carrier is manufactured by extrusion as described above,
Since the rubber portion contracted by the pressure inside the extruded portion is expanded to the outside and becomes indefinite, the specific surface area of the carrier is reduced to 2
It can be more than double. Therefore, many microorganisms can be immobilized on the carrier surface by attaching a large amount of activated carbon or a similar inorganic fine powder to the surface thereof, and high-speed treatment of wastewater becomes possible, and the blending of raw materials can be easily adjusted in the production process. Becomes Also, if the carrier is manufactured by extrusion,
The size and specific gravity of the carrier can be easily adjusted by adjusting the size of the nozzle and the cutting speed of the extruding section, so that the requirements for each use of the product can be easily adjusted, and the production yield can be greatly improved.

Next, an apparatus for effectively treating wastewater using the above granular carrier will be described with reference to FIGS. This device is, as shown in FIG.
And an inner cylinder 20 provided inside the outer cylinder 10 and an outer cylinder 1
A supply unit 30 installed at the upper part of the feed unit 0 to supply wastewater;
A carrier separating unit 40 installed at the upper part of the inner cylinder 20 for separating and guiding the bubbles B attached to the granular carrier C downward; A discharge pipe 50 for discharging waste water, an inner pipe diffuser 60 and an outer pipe diffuser 70 which are respectively provided at predetermined intervals outside the inner pipe 20, and compressed air which is provided below the inner pipe 20 and is provided below the inner pipe 20. An injection pipe 80 through which the wastewater is supplied, an overflow pipe 90 located above the carrier separating section 40 and overflowing when the water level exceeds a certain level, and a wastewater overflowing from the overflow pipe 90 receiving the wastewater. The guide tube 100 includes a guide tube 100 that guides the wastewater in the lateral direction and an inclined tube 110 that guides the guide direction of the wastewater and the granular carrier C inside the spray tube 80.

The outer cylinder 10 has a cylindrical shape, and can be manufactured to have an actual height of about 10 to 15 m so that the treatment efficiency is further improved, and the wastewater / granule carrier which rises by air lifting action is formed. A guide member 11 protrudes from a predetermined position on the upper wall of the outer cylinder 10 so as to be circulated again.

The inner cylinder 20 is installed with a fixed space 21 between the inner cylinder 20 and the outer cylinder 10 and moves the waste water downward together with the air supplied from the inner cylinder diffuser 60 and the outer cylinder diffuser 70. After that, lifting is performed through the space 21.

The supply section 30 is provided at the uppermost end of the outer cylinder 10 and an inflow pipe 31 having a predetermined length is provided so that waste water is supplied from the supply section 30 into the outer cylinder 10. It extends through the part 40 to the inside of the inner cylinder 20, and is supplied with wastewater via the inflow pipe 31 to indicate a predetermined water level.

On the other hand, the carrier separating section 40 has a funnel shape, and has an inclined surface 41. On one side of the overflow pipe 90, the wastewater treated in the guide pipe 100 overflows. A discharge hole 91 to be supplied is formed, and the guide tube 100 is installed so as to communicate with the discharge tube 50.

The inner diffuser 60 and the outer diffuser 7 are also provided.
As shown in FIG. 3, 0 is installed through the outer cylinder 10, and an inner cylinder annular pipe 61 and an outer cylinder annular pipe 71 are arranged around the inner and outer circumferences of the inner cylinder 20 at regular intervals. Of these, a plurality of exhaust holes 62, 7 are formed in the annular pipes 61, 71 for the outer cylinder.
2 is formed so that the inflowing air is injected. The positions where the exhaust holes 62 and 72 are formed may be formed above or below the annular pipe 61 for the inner cylinder and the annular pipe 71 for the outer cylinder.

On the other hand, an injection pipe 80 is provided below the inner cylinder 20.
The compressed air from the compressor (not shown) is intermittently introduced into the injection pipe 80 and injected from the lower inside to the upper part of the outer cylinder 10 to raise the contaminants and the granular carrier to be precipitated. It is made to let. An inclined pipe 110 is provided inside the injection pipe 80 so as to guide the guiding direction of the sludge and the granular carrier. The inclined pipe 110 has an upper portion formed in a conical shape, and a mixed liquid of the sludge and the granular carrier is provided. Is naturally guided upward from below, so that the liquid can be evenly supplied to the outer cylinder.

Further, a gravel layer 1 is provided above the injection pipe 80.
The gravel layer 120 prevents various contaminants from flowing into the injection pipe 80 and generates the generated air bubbles B.
It plays the role of breaking down the details. Therefore, when the compressed air is supplied through the injection pipe 80, the floating of various contaminants and the granular carrier becomes smoother.

In the wastewater treatment apparatus according to the present invention, the wastewater is supplied through the supply part 30 and penetrates through the outer cylinder 10 in an upright state.
, Passes through the lower part of the inner cylinder 20 whose upper and lower parts are opened, and rises again via the space 21 between the inner cylinder 20 and the outer cylinder 10. The inner cylinder 20 is provided with an inner cylinder air diffuser 60, and an extension of the inner cylinder air diffuser 60 is provided with an inner cylinder annular pipe 61 along the inner peripheral surface of the inner cylinder 20. Therefore, the air is exhausted through the exhaust hole 62 of the annular pipe 61 to float the sludge. The inner cylinder 2 is provided at the extension of the outer cylinder air diffuser 70.
An annular pipe 71 for the outer cylinder is provided along the outer peripheral surface of the outer pipe 0, and air flows in through the annular pipe 71, and the air is exhausted in the annular pipe 71 and exhausted in the annular pipe 71. The exhaust gas is exhausted through 72, and the wastewater in the outer cylinder 10 is moved upward by the buoyancy of air. By the way, since the cross-sectional area of the inner cylinder 20 is smaller than the cross-sectional area of the outer cylinder 10 and the area of the space 21 is relatively larger than the cross-sectional area of the inner cylinder 20, Reaches several times (approximately 4 to 5 times) the flow velocity of the air passing through the space 21, and the air floating speed increases. Therefore, the air supplied through the inner cylinder annular pipe 61 moves downward, passes through the lower end portion, and then rises again, thereby facilitating the recirculation of the wastewater.

Here, the volume of the air decreases while decreasing due to the water pressure, and the volume increases while increasing the air, so that the role of the air lift is increased. In addition, the water pressure will receive about 1 to 1.5 kg / cm ² at the lower end,
The air transmission effect becomes relatively large. At this time, since the granular carrier C according to the present invention has been charged into the outer cylinder 10 in advance, the microorganisms attached to the granular carrier treat the contaminants in the wastewater while flowing together with the wastewater. Therefore, the granular carrier C exists in a floating state inside the outer cylinder 10, and the wastewater is treated and purified while the granular carrier C also flows by the recirculation flow of the wastewater.

In this process, air is jetted into the outer cylinder 10 to generate air bubbles B. The air bubbles B are combined with the air bubbles B while rising, and are formed larger and come into contact with the water surface and break. become. By the way, fine bubbles B are also attached to the granular carrier C for treating the wastewater, and the bubbles B
The granular carrier C to which the particles are attached rises while floating. In the ascending process, the granular carrier C becomes smaller in space from the lower part to the upper part of the outer cylinder 10 due to the inclined surface 41 of the carrier separating part 40, so that the collision between the granular carriers C becomes severe, and the granular carrier C At the same time, the attached bubbles B are separated from the granular carrier C while being broken, and vibration is generated at the same time. Thereby, the floating small bubbles B are broken by the vibration. In this state, the granular carrier C and the bubble B are separated while rising along the inclined surface 41 of the carrier separating unit 40 according to the present invention, and the granular carrier C separated from the bubble B is formed on the inclined surface 41 of the carrier separating unit 40. It is guided downward along the inner surface and is sucked into the inner cylinder 20.

As the above action is repeated, the microorganisms attached to the granular carrier C are generated and developed while decomposing various sewage, attached to the granular carrier B, and become larger. Are cut while colliding with each other, and the cut granular carrier C can be picked up by the inclined surface 41 of the carrier separating section 40 and moved downward to maintain the granular carrier C of a certain size. Further, since the separated sludge is light, it is discharged to the outside of the discharge pipe 50 through the overflow pipe 90 and the guide pipe 100 together with the treated water. After storing the separated wastewater in another sedimentation tank (not shown), and leaving it for a certain period of time,
The decomposed sludge is settled, thereby forming purified water.

On the other hand, the injection pipe 80 arranged at the lower part of the outer cylinder 10 allows the compressed air to flow intermittently to float the granular carrier to be deposited at the lower part of the outer cylinder 10 upward.
At this time, since the gravel layer 120 having a predetermined height (10 to 20 cm) is formed, the floating of the contaminants and the granular carrier is easy, and the compressed air injected collides with the gravel layer 120 to cause small bubbles. Since it becomes B, the oxygen dissolution rate is improved. In addition, since the contaminants and the granular carrier are not immediately deposited on the lower end of the outer cylinder 10, the phenomenon that the injection holes of the injection pipe 80 are supported can be prevented.

[0035]

The present invention will be described below with reference to examples.

Experimental Example 1 100 parts by weight of tire powder (particle size: 0.2 to 3 mm) and EV
After 30 parts by weight of A and 10 parts by weight of 200- mesh fine powdered activated carbon were mixed well using a mixer, the mixture was heated to 170 ° C. to completely dissolve EVA, and the mixture was drawn into an extruder. The carrier extruded through the outlet of the extruder is cut into a certain size, and the activated carbon powder is coated on the EVA remaining in a state of being adhered to the surface by the retained heat of the cut carrier, thereby increasing the specific surface area. A granule carrier was produced and was referred to as Example 1.

A granular carrier of Example 2 was obtained in the same manner as in Example 1 except that the amount of EVA to be blended was 40 parts by weight. Further, a granular carrier of Example 3 was obtained in the same manner as in Example 1, except that the amount of EVA to be blended was changed to 50 parts by weight.

The average particle size of the granular carrier thus produced was 2 to 11 mm, and the yield was 97% or more. Also, as a result of immersing these granular carriers in water, about 70% was immersed after 7 hours, and the entire amount was immersed after 20 hours. Table 1 shows the results.

[0039]

[Table 1]

Experimental Example 2 Granular carriers of Examples 4 to 6 were obtained in the same manner as in Example 3 of Experimental Example 1, except that the average sphere diameter was as shown in Table 2 below. Table 2 shows the results.

[0041]

[Table 2]

EXPERIMENTAL EXAMPLE 3 100 parts by weight of tire powder (particle size: 0.2 to 3 mm) and 30, 40, and 50 parts by weight of EVA, respectively, were thoroughly mixed with a mixer, and the EVA was completely melted. I retracted. The outlets of the extruder were each 8 mm in diameter, and the temperature of the extruder was maintained at about 120 ° C. At this time, the carrier is extruded in a linear state, and by passing the carrier in the linear state through a bath containing powdered activated carbon of 200 mesh, EVA or its derivative dissolved on the surface of the carrier due to its own heat is obtained. After adhering the activated carbon, the carrier surface was coated with activated carbon by passing again through a bath containing cold water and rapidly cooled, and the cooled linear coated carrier was introduced into a cutting machine and cut into a predetermined size. The average particle size of the produced granular carrier was 9.8 mm, and the yield was 99% or more. Further, as a result of immersing the carrier in water, about 70% was immersed after 7 hours, and the entire amount was immersed after 20 hours.

EXPERIMENTAL EXAMPLE 4 Using the treatment apparatus according to the present invention, an experiment for treating domestic wastewater was conducted under the conditions shown in Table 3 below. The granule carrier used in Example 1 was used. Table 3 shows the results.

[0044]

[Table 3]

As can be seen from Table 3, the biological oxygen demand (BOD) of the wastewater is between 150 and 250 (average 200) mg.
/ L, and when a facility for treating domestic sewage with a daily wastewater generation of 120,000 m ³ is installed, the standard activated sludge process is performed for 6 hours to achieve a treatment rate of about 90%. Has a capacity of 30,000 m ³ .
Therefore, the BOD volume load is 0.8 kg / m ³ / day, and the F / M ratio is 0.27 to 0.40. The site where such an aeration tank is installed is 7500 m ² , and about 227
3 tsubo is required. However, when installed at an effective water depth of 10 m using the treatment apparatus of the present invention, the F / M ratio is 0.24 to
Despite 0.32, a value similar to the activated sludge process, the volume of the aeration tank can be reduced by a factor of 6 to 6000 m ³ . The BOD volume load is 4.8 kg / m ³ / day, which can be increased six times.
Therefore, the site area required to install the aeration tank is 500m
^{With 2} , it can be reduced by a factor of 15.

When installed at an effective water depth of 15 m, other operation indices are the same as those at an effective water depth of 10 m, but the site required for installation is reduced to 334 m ² . In addition, when the oxygen consumption was calculated and observed, all the facilities installed using the standard activated sludge method and the present invention showed 7547.5 kg O _2.
/ Day, same. However, it can be seen that the difference in the amount of air to be actually supplied is large. And effective water depth 10
m, 270 Nm ³ per minute, about half the supply can be processed. And effective water depth 15
m and 237 Nm ³ / min, it is possible to supply only 43.9% of the standard activated sludge method.

EXPERIMENTAL EXAMPLE 5 Using the treatment apparatus according to the present invention, an experiment for treating domestic wastewater was performed under the conditions shown in Table 4 below. The granule carrier used in Example 1 was used. Table 4 shows the results.

[0048]

[Table 4]

As can be seen from Table 4, the chemical oxygen demand (COD) of the wastewater is 350-450 (400 on average) / mg.
L, and when a facility for treating hard-to-degrade papermaking wastewater with a daily wastewater generation of 10,000 m ³ is installed, the activated sludge method should be treated for 24 to 30 hours to achieve a treatment rate of about 90%. And the capacity of the aeration tank at this time is 10
00m ^3. Therefore, the COD volume load is 0.4 and the CODF / M ratio is between 0.13 and 0.20 kg / m ³ /
Day.

The site where such an aeration tank is installed is 250
At 0 m ² , about 785 tsubo is required. However, when the apparatus according to the present invention is installed at an effective water depth of 10 m, F /
The M ratio (food / Micro, ratio of organic pollutants to microorganisms) is 0.
The volume of the aeration tank is 1667 m ³ , despite being similar to that of the activated sludge method at 12 to 0.16,
It can be reduced by a factor of six. The COD volumetric load is 2.4 kg / m ³ / day, which can be increased six times. Therefore, the site area required to install the aeration tank is 16
At 8 m ² , it can be reduced to about 15 times. Also,
When installed at an effective water depth of 15 m, other operation indices are the same as those at an effective water depth of 10 m, but the site required for installation is reduced to 112 m ² .

The calculated oxygen consumption shows that all of the standard activated sludge method and the apparatus according to the present invention are 2475 k.
gO ₂ / day, identical. However, it can be seen that the difference in the amount of air to be actually supplied is large. That is, when using the standard activated sludge method, the amount of air to be supplied is 178 Nm ³ per minute. However, when installed at an effective water depth of 10 m, the amount of air to be supplied is 89 Nm per minute.
^{In 3} , it is possible to process by feeding only about half of the standard activated sludge method. When installed at an effective water depth of 15 m, the amount of air to be supplied is 78 Nm ³ / min, and it is possible to supply only 43.9% of the standard activated sludge method.

[0052]

As described above, the granular carrier according to the present invention has high mechanical abrasion resistance and chemical resistance, and the strength of the granular carrier and the adhesion strength of the inorganic powder are improved. At the time of aeration at the surface, desorption of the coated inorganic powder is prevented,
When the specific industrial wastewater is applied, the specific surface area of the granular carrier can be fully utilized, as well as the form is not easily worn due to the wastewater temperature and mechanical impact. In particular, by increasing the specific surface area of the carrier, many microorganisms can be immobilized on the surface of the carrier, thereby enabling high-speed treatment of wastewater. And, when manufacturing granule carrier, it is easy to adjust the blending of raw materials, it is easy to adjust the size and specific gravity of the carrier, it is easy to adjust the requirements for each application of the product, and the production yield is large There is an effect to be improved.

In the present invention, the wastewater treatment apparatus into which the granular carrier is charged enables rapid treatment of the wastewater, thereby improving the treatment efficiency.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of an embodiment of a wastewater treatment apparatus of the present invention.

FIG. 2 is a sectional view showing an operation state of the wastewater treatment apparatus of FIG. 1;

3 (a) is a cross-sectional view of an inner pipe diffuser portion of the wastewater treatment apparatus of FIG. 1, and FIG. 3 (b) is a sectional view of an outer pipe diffuser section of the wastewater treatment apparatus of FIG. FIG.

[Explanation of symbols]

 B: Bubble C: Granule carrier 10: Outer cylinder 11: Guide member 20: Inner cylinder 21: Space section 30: Supply section 31: Inflow pipe 40 ...・ Carrier separation part 50 ・ ・ ・ Discharge pipe 60 ・ ・ ・ Inner cylinder diffuser pipe 61,71 ・ ・ ・ Outer cylinder enemy pipe 62,72 ・ ・ ・ Exhaust hole 70 ・ ・ ・ Outer cylinder diffuser pipe 80 ・ ・ ・ Injection pipe 90 ... overflow pipe 91 ... discharge hole 100 ... guide pipe 110 ... inclined pipe 120 ... gravel layer

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-52-109762 (JP, A) JP-A-8-266189 (JP, A) JP-A-63-42795 (JP, A) JP-A-4- 354597 (JP, A) Japanese Utility Model Hei 1-128899 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) C02F 3/10 C02F 3/08 C12N 11/00

Claims (13)

(57) [Claims] 1. EVA or a derivative thereof, which is 100 parts by weight of tire powder and a binder to the tire powder, which is hydrophilic, has bonding strength and is chemically stable, and can withstand high temperatures.
Parts by weight, activated carbon or an equivalent inorganic fine powder 5-1
A granular carrier for treating wastewater comprising 5 parts by weight. 2. After mixing and stirring tire powder and EVA or a derivative thereof in a ratio of 100 parts by weight to 30 to 50 parts by weight, at a temperature of 100 to 250 ° C., EVA or After dissolving the derivative and binding the powdered tire with activated carbon or an equivalent inorganic fine powder,
A method for producing a granular carrier for wastewater treatment using a tire, comprising extruding with an extruder, cutting, and coating powder on EVA or a derivative thereof remaining in a state of being adhered to the surface of the carrier. 3. EVA to 100 parts by weight of tire powder
Alternatively, 30 to 50 parts by weight of a derivative thereof are mixed and stirred to maintain a homogeneous state, and then melted at a temperature of 100 to 250 ° C. to melt the EVA or a derivative thereof to bind the powdered tire and then extrude. At the time of extrusion, at the time of extrusion, an activated carbon or an inorganic fine powder equivalent thereto is adhered to the surface by using EVA or a derivative thereof melted on the surface due to its own heat,
A method for producing a granular carrier for treating wastewater using a tire, which is cut into a certain size after cooling. 4. An outer cylinder, an inner cylinder provided inside the outer cylinder, a supply unit installed at an upper part of the outer cylinder to supply waste water, and a granular carrier installed at an upper part of the inner cylinder. A carrier separation unit that separates and guides bubbles attached to the container downward, a discharge pipe provided at one upper side of the carrier separation unit to discharge treated wastewater, and a fixed interval outside the inner cylinder. An inner pipe diffuser pipe and an outer pipe diffuser pipe which are respectively installed, an injection pipe which is installed at a lower part of the inner cylinder and through which compressed air is injected, and which is located at an upper part of the carrier separating part and is fixed. An overflow pipe that overflows when the water level is exceeded, a guide pipe that receives the wastewater overflowing from the overflow pipe and guides the wastewater in one direction, and guides a guide direction of the wastewater and the granular carrier inside the injection pipe. And an inclined tube to be able to Wastewater treatment equipment using granular carriers. 5. The outer cylinder according to claim 4, wherein the outer cylinder has a cylindrical shape, and a guide member is formed at a predetermined position on an upper wall of the outer cylinder so as to recirculate the rising wastewater and the granular carrier. Wastewater treatment equipment using granular carriers. 6. The wastewater treatment apparatus using a granular carrier according to claim 4, wherein the inner cylinder is provided at a certain space from the outer cylinder. 7. The supply unit is provided at an uppermost end of an outer cylinder,
7. An inflow pipe having a predetermined length extending through the carrier separation section and extending to the inside of the inner cylinder so that the waste water is supplied from the supply section into the outer cylinder. A wastewater treatment apparatus using the granular carrier according to any of the claims. 8. The wastewater treatment apparatus using the granular carrier according to claim 4, wherein the carrier separating section has a funnel shape and has an inclined surface. 9. The wastewater treatment apparatus according to claim 4, wherein a guide pipe provided around the overflow pipe is installed so as to communicate with the discharge pipe. 10. One side of said overflow pipe,
The wastewater treatment apparatus using the granular carrier according to claim 9, wherein a discharge hole is formed to allow the treated wastewater to flow and be discharged to the overflow pipe. 11. The inner cylinder air diffusion pipe and the outer cylinder air diffusion pipe are installed so as to penetrate the outer cylinder, and the inner cylinder annular pipe and the outer cylinder annular pipe are arranged at regular intervals on the inner and outer peripheral surfaces of the inner cylinder. Is established
A wastewater treatment apparatus using the granular carrier according to claim 10 . 12. The granule according to claim 11, wherein a plurality of exhaust holes are formed in the annular pipe for the inner cylinder and the annular pipe for the outer cylinder so that the inflow air is injected. Wastewater treatment equipment using a carrier. 13. A gravel layer is provided at an upper portion of the injection pipe to prevent sludge and granule carriers from settling on the bottom surface of the outer cylinder and flowing into the injection pipe and to break air bubbles finely. 13. A wastewater treatment apparatus using the condylar carrier according to any one of claims 4 to 12.